• Journal of the Korean Home Economics Association
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• v.44 no.4 s.218
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• pp.159-173
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• 2006

The purpose of this study was to investigate the seating style of children between Korea and USA viewed from activity analysis in child-care centers. Observation and depth-interview method were used for data collection. Ninety-eight children aged from 38 to almost 62 months were observed for five minutes three times during an indoor free play period in Korea and USA in 2003 and 2004. The results of the research were as follows. There were significant differences between the postures of Korean and American children. Korean children maintained floor-seating postures longer than chair-seating and standing postures. The factors such as sex, age and physical environment influenced the children's seating style, while playing-type influenced their posture. This study will contribute to our understanding of the physical environment and children's seating style according to culture.

• Journal of Institute of Control, Robotics and Systems
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• v.8 no.6
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• pp.477-483
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• 2002

This paper deals with a workspace analysis of multi-legged walking robots in velocity domain(velocity workspace analysis). Noting that when robots are holding the same object in multiple cooperating robotic arm system the kinematic structure of the system is basically the same with that of a multi-legged walking robot standing on the ground, we invented a way ot applying the technique for multiple arm system to multi-legged walking robot. An important definition of reaction velocity is made and the bounds of velocities achievable by the moving body with multi-legs is derived from the given bounds on the capabilities of actuators of each legs through Jacobian matrix for given robot configuration. After some assumption of hard-foot-condition is adopted as a contact model between feet of robot and the ground, visualization process for the velocity workspace is proposed. Also, a series of application examples will be presented including continuous walking gaits as well as several different stationary posture of legged walking robots, which validate the usefulness of the proposed technique.

• The Journal of Korean Physical Therapy
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• v.16 no.2
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• pp.116-127
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• 2004

The purpose of this study was to determine the effect of shoe lift of the affected limb in subjects with hemiplegia. The subjects of this study were 18 post-stroke hemiplegics. For the study, insole of the paretic side was lifted 10 mm higher, and static weight bearing was measured before and after the lift application. For the measurement of carry-over effect of lift, we got data of those three items prior to and 3 weeks after lift application and 3 days after removal of the lift. Static weight bearing was significantly increased both just after and continuous application of lift for 3 weeks than before. According to this study, lift applied to the shoe of the paretic limb was effective in inducing static weight bearing in the paretic limb. This study suggests that symmetry, induced by shoe lift applied to the paretic limb, could help correct abnormal posture that would be caused in standing and prevent development of abnormal muscle tone in subjects with hemiplegia caused by unilateral stroke.

• The Journal of Korean Physical Therapy
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• v.14 no.3
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• pp.106-115
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• 2002

This study examined on the causes of chronic pain in the knee joint that was related to the aspects of teacher's job and daily lives. The subjects of investigation in this study include 237 of teachers who work at the elementary, middle and high schools. The chronic pain of knee joint of the subjects' is mainly related to their stress, and also to the vehicle that they normally use(p<0.05). This study aims at grasping the frequency of the pain which is caused by a knee joint's stress when teachers teach in a standing-up posture for many hours, looking at the aspects in the pain of knee joint that are related to job, being conducive to the development of the pain-cure, and, in addition, presenting an effective countermeasure to related agencies in order to prevent such diseases as arthritis.

• Journal of the Korean Society for Precision Engineering
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• v.24 no.5
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• pp.110-117
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• 2007

According to the pedestrian protection regulations of Europe and Japan, the head injury must not exceed a limitation in the defined test condition for the protection of pedestrians from a vehicle crash. However, it is difficult to evaluate the performance of protection because each regulation has different test conditions such as dummy, impact speed and so on. This circumstance needs the development of a model that describes the anthropometry of the crash victim with a sufficient accuracy. We constructed scaled pedestrian dummies using MADYSCALE. Simulations were performed for various crash speeds and pedestrian postures. The scaled Korean dummies and HybridIII dummies were used to compare the pedestrian dynamic behaviors and head injury criteria during the collision. The HIC values of scaled korean dummies were found to be higher than those of Hybrid III dummies. The impact for gait posture was less than that for standing.

• Journal of the Korean Society of Clothing and Textiles
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• v.26 no.11
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• pp.1514-1526
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• 2002

The objective of this study is to ascertain the major considerations when designing slacks for automobile drivers reflecting the elasticity of the human body posture. The scope of this study aims to find out the causes of discomfort in driving positions based on the results of a questionnaire survey and body measurements fur slacks, as well testing four types of experimental slacks for comfort and fitness when sitting on a driver's seat and in the standing position. Based on the results, a slacks design for drivers with improved comfort and fitness is suggested.

• Journal of the Korean Home Economics Association
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• v.43 no.6 s.208
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• pp.27-35
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• 2005

The purpose of this study was to develop motorcycle wear with built-in airbag protection for enhanced comfort and fit. Based on the survey results, a motorcycle jacket was designed using. Aauto CAD. This study concentrated on the wearing comfort comparison of the motorcycle jacket developed from this research with that of and foreign goods. To evaluate the wearing comfort, 3 types of motorcycle jackets were used. The results of this study were as follows. : From an Analysis of the differences in wearing comfort, the motorcycle jacket developed proved to be more convenient than the 2 types of foreign motorcycle jackets in terms of the standing and handle grip posture. This effect was due to the curved pattern of the neckline part of the airbag. The air pressure of the airbag must be improved.

• Journal of the Korea Safety Management & Science
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• v.6 no.4
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• pp.99-106
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• 2004

In developing criteria for establishing workstation reach limits, it is essential to select the appropriate anthropometric stereotype for solving a specific design problem. The most important factor for comfortable workstation is to eliminate trunk flexion from the neutral (upright) posture. A solution to this design can be developed using population stature and link length data. This paper provides a methodology for design of comfortable workstation using anthropometric stereotype. Application of this methodology can be utilized in various designs for work space including standing and sitting workplace. For the purpose of this study, the data are measured by some parts on body such as stature, arm length, wrist height, elbow height, and shoulder hight. The samples for this study are randomly chosen from university students in Seoul and Kangnung during sixteen months (2003.3-2004.6).

• Physical Therapy Korea
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• v.3 no.3
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• pp.59-66
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• 1996

The purpose of this study was to assess the biomechanical effects of corset and back brace for low back pain syndroms patients. The subjects of this study were 69 patients with low back pain syndroms who had been hospitalized or were visited out-patient department of the rehabilitation hospital, college of medicine, Yonsei University, from October 5, 1995 through November 5, 1995. Clinical results and datum were obtained by phone calls and chart reviews of low back pain patients. The results were as follows: 1) Fifty - nine subjects recovered over a good grade (85.6%). 2) The standing workers had a little effect of brace for low back pain. 3) After using a corset and back brace, the test of SLR increased from 36.23% to 72.47%, and the ability of ambulation improved from 40.57% to 85.5%. In conclusion, the biomechanical effects of corset and back brace for low back pain patients were found to be decrease pains and improve posture and ADL function.

• Proceedings of the KSRS Conference
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• 2003.11a
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• pp.946-948
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• 2003

This paper describes the development of an INS (Inertial Navigation System) integrated positioning system, which can monitor and track the firefighter's position for assisting effective fire-fighting activity and rescue services. The INS consists of highly accurate three-axis gyro sensor and three-axis accelerometer. By integrating an INS to positioning system, it is also possible to obtain the information of firefighter's physical state (e.g. standing, collapse and crouch) of posture including velocity. Consequently, this research would obviously make a contribution to effective rescue activities and safety of firefighters. Besides, this paper presents results from field tests conducted at Tokyo University demonstrating its viability and utility. We also summarize the overall system requirements and architecture, and describe the hardware and software used in the prototype system in detail.